/*
* Copyright (c) 2007, Nubo Technologies
* 
* All rights reserved.
* 
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
*
*    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
*    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
*    * Neither the name of the Nubo Technologies nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

package com.nubotech.gwt.oss.client;

import java.util.ArrayList;
import java.util.List;

/**
 * 
 * Holds the result of calls to return a list of ObjectHolders
 * @author jonnakkerud
 */
public class ObjectHolderResult {
    private List objectHolderList;
    protected OnlineStorageServiceError error;
    
    public ObjectHolderResult(List objectHolderList, OnlineStorageServiceError error) {
        this.objectHolderList = objectHolderList;
        this.error = error;
    }
    
    /**
     * Returns true if an error occured when getting ObjectHolder(s) from S3
     * @return true if an error occured
     */
    public boolean hasError() {
        return (error != null);
    }
    
    /**
     * Return the error
     * @return the error
     */
    public OnlineStorageServiceError getError() {
        return error;
    }
    
    /**
     * Return the number of ObjectHolders
     * @return the row count
     */
    public int getRowCount() {
        return objectHolderList.size();
    }
    
    public boolean hasObjectHolder() {
        return getRowCount() > 0;
    }
    
    /**
     * Return the first ObjectHolder
     * @return the first ObjectHolder
     */
    public ObjectHolder getObjectHolder() {
        return get(0);
    }
    
    /**
     * Return an ObjectHolder from the list
     * @param row the row number
     * @return an ObjectHolder
     */
    public ObjectHolder get(int row) {
        return (ObjectHolder)objectHolderList.get(row);
    }
        
}
